Otto III of Carinthia

Otto "the Merry", Duke of Austria (23 July 1301-17 February 1339) was Duke of Austria and Styria from 1330 to 1339, succeeding Frederick I of Austria and preceding Albert II of Austria, and Duke of Carinthia from 1335 to 1339, succeeding Henry of Bohemia and preceding Albert.

Biography
Otto was born on 23 July 1301 in Vienna, Duchy of Austria, Holy Roman Empire, the youngest son of Albert I of Germany and Elizabeth of Carinthia; his older brothers were Rudolf I of Bohemia, Frederick the Fair, Leopold I, Duke of Austria, and